Ronnie made his first century when he was 10 years old. At 15 yr 98 days he became the youngest player ever to make a maximum in tournament play, during the English Amateur Championship (Southern Area) at Aldershot, Hants on 13 Mar 1991. Seven years later he made a maximum in just 5 min 20 seconds in the 1997 Embassy World Championship.

He holds the record for most maximums in professional competition with 13.